pribnow



(No Model.) 3 Sheets-Sheet 1.

J. F. PRIBNOW.

SAW SWAGE.

No; 508,118. Patented Nov. 7,1893.

WITNESSES.

n15 NAYIONAL LIYHOBRAFNINQ cuMPANY.

w/uumm'on. o. c.

(No Model.) 3 Sheets-Sheet 2.

' J. F. PRIBNOWJ SAW SWAGE.

Patented Nov. 7, 1893.

as l UNITED STATES" PATENT OFFIcE.

JOHN F. PRIBNOW, OF INDIANAPOLIS, IhIDIAN A.

SAW-SWAG E.

SPECIFICATION forming part of Letters latent No. 508,118, dated November7, 1893.

' Application filed May 1; 1893. Serial No. 472,524. (No model.)

Be it known that I, JOHN F. PRIBNOW, a

citizen of the United States, residing at' Inas Fig. 2, except thattheanvil and its pitmanv dianapolis, in the countyof Marion and State ofIndiana, hay nvented certain new and usefulImprovem' its in Saw-Swages,of which the followingis'a"specification.

The object of my'said invention is to produce a machine by which theteeth of saws may be swaged and shaped complete at asingle operation. Amachine embodying said invention will first be fullydescribed, and thenew features then pointed out in the claims.

Referring to the accompanying drawings, which are made a parthereof,ancl on which similar letters of reference indicate similarparts, Figure 1 is a side elevation of a com?- bined swage and shaperembodying my invention, placed upon a fragment of a saw in positionready for use; Fig. 2 a central vertical sectional view of the same, theanvil or swaging-block therein being shown in side elevation; Fig. 3 atop or plan view thereof; Fig. 4: an under side plan, with the anvilandits pitman thrown out from position; Fig. 5 a transverse sectional Viewand rear elevation as seen from the dotted line 5 5 in Fig. 1; Fig. 6atransverse sectional view and front elevation, as seen from thedottedline 6 6 in Fig. 1; Fig. 7 a sectional view on an enlarged scale,on the dotted line 577 in Fig. 4, and showing substantially thesamearrangement are swung out and apart from each other; Fig. 8 a transversesectional view on the dotted line 8 8 in Figs. 1 and 2; Fig. 9 ahorizontal sectional view looking upwardly from the dotted line 9 9 inFig. 1; Fig. 10 an under side plan view of the anvil and adjacent parts;Fig. 11 a top or plan view of the clamping jaws separately, on asomewhat further onlarged scale; Fig. 12 a side viewof the same, andFigs. 13 and 14 front and rear elevations thereof.

In said drawings the portions marked A represent the main casting orframe-work of the machine; B B the clamping jaws; O a screw by whichthejaw B is operated; D the rotary swage; E a lever by which said swageand the anvil operating camare operated; F a pitman running from said'cam to the anvil-block; G the anvil-block, and II the anvil.

The frame-work A is preferably a single casting, of the form shown, andfitted to receive and support the mechanism and operating parts whichare attached thereto, by suitable bolts, screws, and other connections,as shown. Connected thereto by an angleplate A is a bar or tail-piece Awhich extends out rearwardly therefrom, and carries a yoke A whichextends down astride of the saw, and a pin a wherein is adapted to restupon the top of a saw tooth, thus determining the relation of themachine to the sawin use. The angle-plate A towhich this tail-piece isdirectly connected, has a slot at, through which one of the bolts a bywhich said tailpiece is connected thereto, passes, and, by means of thisslot and bolt, the machine may be given any angle relative to saidtail-piece, which may be desired, within the limit of its adjustment.The machine is thus adapted to operate upon teeth of varying angles. Theyoke A by means of a set-screw 0. may be secured at any point desiredupon said tailpiece, thus adapting it for use with saws hav ing teeth ofvarious sizes, and, as before stated, itcar'ries the pin a which restsupon the backof. ,a saw-tooth when the machine is in position for use,as shown, and contact with the points of the teeth, which might resultin dulling or breaking them, is thus avoided. Upon bne side of the frameA,just behind the lever E, is a segmental plate A secured theretobyascrew a and having a projecting rim R, as shown most plainly in Figs. '1and 8, upon which are stops R and R which-are adjustably secured to anydesired p'ositon by set-screws 4" W, as shown most plainly in Fig. 1.These stops limit the movement of the lever E, and, consequently, theoperation of the swage and anvil. As will be readily understood, saidstops can be ad- 1 justed to any desired points along said rim."

The clamping jaws B and B are placed between the two sides of the frameA at their-ear, and are adapted to clamp against the sides of the sawbeing operated upon, thus secula points are thus brought up above theswage are supported by said swage. The extreme close to the anvil, andperform an important service in shaping the teeth of the saw. As shownin the drawings, most plainly in Figs. 11, 12 and 13, the corners ofthese jaws are 5 formed to taper in both directions upwardly andforwardly toward the point of the tooth being operated upon; and thusdetermine the shape of the sides of said tooth at its extreme point whenforced between them by the operation of the swage and the anvil. Thesides of the points of the saw teeth, as well as their tops andbottoms,.are thus given an exact shape, and, therefore, need no .furthertreatment,in the way of setting or otherwise, after I 5 being operatedupon by the swage, they not only being spread to a-uniform width, butalso given a uniform shape and position relatively to each other and tothe saw blade. "It-issometimesdesirable to swage the saw teeth simply,andnot dress or'shape the sides. In order that this may be done by mymachine, I prefer, as shown in Fig. 13, totriln off one corner of eachof the clamping jaws more than theothers, so that when these corners ofsaid jaws are in position for oprationthey will not come in contact with'the sides of the points of the teeth, thus'leaving "themroom to bespread to thefull limit of the operation of the swage. I usually provide0 my maclrine'with several anvils, one ofwhich has i a wide face; and byusing the widefaced anvil and these cut 06 corners of the clamping-jaws,my machine does'swagiug of substantially the ordinary sort, but inasupe- 5 rior manner. The other three corners of the *front'ends oftheclamping jaws areusually all-alike, but may be varied to operatewithteeth of various proportions. These-corners areall-made in pairs, andnumbered,-so that o-by simply turning these jaws over, or shifting themfrom one side of the-machine to the other, any desired adjustment of thefour can be-had. One' of the jaws, B, in operation,

' is held fast to the side of the machine 'A by 5 'a machine-screwb, asshown most plainlyin Fig. 9. The hole in the framethroughwhich this-machine-screw passes is elongated, or in the form of a slot, so thatthe desired longitudinaltadjustment may be securedyand a.

5: set-screw b may be driven in against said screw, thus holding it towhatever positionis desired. A thin backing plate B is preferablyinterposed between the jaw B and the frameA; and may be-removedaltogether, or

a thicker or thinner one substituted, to properlyadjust the spacebetween the" jaws according to thickness of' the saw to beoperated-upon. The two: jawsare alike inconstru'ction, but differentlymounted. The jaw Byinstead of-being held fixedly-in place, is "movablyheld by the swage at the front end,

and by the pin or projection b extending into a socket inits rear end'froma bearingblock- B 'c-arriedby and adjustably secured bymeansof abolt b, to a second bearing-block Bfl-which is secured to the frame A bya bolt 13 A set-screw b may operate against thenearer to orfarther fromthe jaw B.

l to different grades of work.

bolt B to hold it to adjusted position. The bearing-block B is renderedadjustable by means of aslot in the bearing-block B through which thebolt 12 passes, as shown in Fig. 9, and the rear end of the jaw B isthus carried The seat in said bearing block B for the jaw B is angularor tapered, so that said jaw in receding, as the screw 0 is turned back,will also drop away from the swage. This is best shown in Fig. 9 wherethe jaw B is shown as swung back, its inner corner being in efiectapivot point, and the pin b a guide to keep and thus said jaw B is'movedtoward or from the sawbeing operated uponyand' said' saw is clampedbetween the jaws Band B, or unclamped, by the -movem-ent-of'-said screw.Upon the outer end of said screw is secured -a lever C'by-which it maybemoved back 'andforth. The -various positions -ot this lever are shown inFig: 1' by meansoffull and dotted lines. In-the position shown in *fulllines, the machine has j ustbeeni placed 'upon the saw ready'to beclamped thereon,

and'thedottedlinesindicate the position it occupies after theclamping'has*beeneifected,

and just before andduring the swaging operation.

The swage or die 'D is'in the form of around -rod, and is'rnountedinbearings in'thet'rameworkA, and isadapted t0-rotate therein.

The bearing for this swage or die is'pret'erably a' hardened sleeve Dwhich is inserted ina suitable orifice in said frameA" and surroundssaid swage orrdie. 'The centralportion of said swage is'cut awaysomewhat upon one side, as shown inthe 'dra'wingspmost plainly in" Figs.2- and 8-;whichgives'it a cam shape at the operating point. 'As will benoticed by anexamination of Fig. 8', this camshaped portion is muchlonger than theportion of its surface which "operates at any one time-inother-words;than thethickness of any saw. This is for the purpose ofgiving the swagegreafer' durability,- as it can be shifted alongfrompoint to point asit wears, thus presenting a new surface several times'before it is completely worn out. Or different portions of its surface'may begiven different forms, thus adapting the same swage This swage isoperated by the'leverE, aswill be presently described. Upon thisouterend, Whereon said lever is mounted, it is preferablyprovided Wllh'a'number of grooves or corrugations, as

shown in Fig. 1, and a key (1 having a; face adapted to engage withsaidgrooves orcorrugations is inserted in a key way cut-in the hub of saidlever, and fits into various ones of these grooves. The swage may thusbe adapted for different grades of work, by loosening the setscrew ewhich holds said key, and turningsaid swage somewhat relatively to thehandle, and re-tightening the set-screw and key, which will be engagedwith different ones of the grooves or corrugations in its surface, sothat, when said swage is rotated, varying portions of its surface may'be brought into active use, and thus different degrees of swaging begiven the teeth being operated upon. Said swage supports the forwardends of the jaws B and B as shown most plainly in Fig. 7. T'he'lever Eis mounted on the outer end of the swage D, in the manner which has justbeen described, and'is there fixedly secured by means of a set-screw ewhich impinges upon the'key d, and forces it firmly against the swage'D,and into engagement with the corrugations therein. For the bettersupport of said lever it is provided with'a hub a surrounding the swagewhich rests in a bearing formed therefor in a bracket A provided forthat purpose, and securedto the frame A. Said lever is thus alsosupported when the swage or die is withdrawn. The positions of thislever are shown in Fig. 1. The position shown in full lines is thatwhich it occupies when first placed upon the saw.- After the lever O ispulled back, however, and'the machine thus clamped upon' the saw, saidlever E is forced forward into the position shown by the dotted lines,which swages the tooth. It not only revolves the swage, but, by means ofthe link E on the arm F operatesthe anvil, as will be presentlydescribed.

The pitman F is driven by a cam F from the arm'F Said'ca'm is mountedupon a rod F passing through arms upon the forward end of the frame A.The cam Fis mounted thereon, and has the arm F formed integrallytherewith, or rigidly attached thereto,'and extending out'and connected,by means of the link E'to the lever E, as has just been described. Thelink E has a hooked end e which hooksover a pin or bolt f 2 on the arm Fforming an easily detachable catch, which is held into engagement by aspring f also attached 'to said arm. When said lever is moved, itrevolves the cam F around the shaft F thus moving the pitman back andforth to a limited extent, and with it the anvil-block and anvil. Theposition of these parts,'assembled,is shown most plainly in Fig. 2, andthey are shown swung out, and' detached,-on a larger scale, in Fig. 7.The pitman is shown as formed in two parts, one screw-threaded into theother, andlockedin position by a lock-nutf, by which means, obviously,its length maybe very finely and accurately adjusted.

As will be seen by a reference to the drawings, particularly Fig. 10,the anvil is tapered longitudinally. An adjustment of the pitmantherefore varies'the width of its operating point. (I prefer toproportion the parts so thatoneturn of the screw will produce avariation equal to on e gage in a saw plate, so that the machine maythen be adjusted by half gages (half turns of the pitman) to the sawsbeing operated upon. The end of said pitman which engages with theanvil-block is in the form of a cross-head f, which slips into acorresponding recess in the anvil-block G. The anvil-block andcross-head are obviously capable of transverse movement relatively toeach other, which enables the anvil to accurately adapt itself totheclamping jaws, as the parts come together. A spring S is coiled aroundthe end of the cam F, and is attached at one end to the frame A, and atthe other end tothe pitman F, in such a manner as to keepthe'anvil-bloc'k always raised up in contact with the pivot-bolt orpoint G over which it oscillates, and thus keeps the anvil up away fromthe die or swage, except when forcibly brought down toward it by theoperation of the mechanism.

The anvil-block G is constructed to hold the anvil H, and is providedwith the recesses by which it may be attached .to the pitman F. Oneportion thereof (which may be in the form of a-separate piece G) isbifurcated, and adapted to pass .astride the shank of the pitman behindits head f whenthe parts are assembled together. A thin-backing-strip gmay be interposed between these parts, which can be removed, and athinner one substituted (or not) for the purpose of adjusting thedevice, for taking up wear or. otherwise. A

knob g is usually'provided whereby this an-- vil-block can beconveniently manipulated. A cavity 9 is formed in its upper surface intowhich the rounded end of a set-screw Gr mounted in the frame A enters,and over this rounded end the block pivots as it is moved back and forthby the pitman. i

The anvilH is formed to come against the top side of the saw tooth,as-the cam surface of the swage enters against the under side.

Its lower surface is struck from a centerslightly in advance of thepoint of the pivotscrew G and thus, as it moves rearwardly, inoperation, its surface approachesthat of the swage D, and two camsurfaces are thus pro- .vided which approach each other during theoperation, thus bringing the pressure equally from the two sides, andspreading or swagin g the tooth uniformly. This is a highly importantresult, as will be readily understood by those skilled in the art. Thisanvil ismade wedge-shaped in both directions, and'is so adjusted andproportioned -as to exactly fill the space between the two jawsB andB'at the completion of the operation of swaging, so that when saidoperation is completed, the swage and the anvil have approached closelyto each other, leaving a sharp edge on the point of the tooth, and atthe same time all the space has been filled by the parts upon all sidesof the point of the tooth, giving it an exact and perfect shape. A sawthus treated is capable of efficient use without filing or-anyadditional treatment whatever.

As has heretofore been explained, however, if the ordinary swaging isfor any purpose desired, instead of the complete combined swaging anddressing de scribed, it can be accomplished by having the jaws turned sothat the cut away corners will come into use, and providing an anvil ofa wider face than the desired point of the saw tooth. The anvil is heldinplace on the anvil-block by the bolt H, which may, and preferablydoes, also hold the part G in place, as shown most plainly in Fig. 7. Myimproved swage also accomplishes its work in a superior manner inanother particular. If the swage proper or die and anvil were moved inthe same direction, the result would likely be, especially in sawsformed of a somewhat brittle quality of steel, that the points would bedrawn upon too hard, and thus broken off. I have arranged that these twoparts shall operate oppositely to each other, and thus the whole powerof the machine is devoted to swaging or spreading and sharpening thetooth, and does not tend to separate or break it. In other words, whilethe.

die or swage proper is drawing up toward the point on the under side ofthe tooth, the anvil is pushing down on the top ofthe tooth in thedirection of the root of said tooth, which operation is a positivecounter-action to the tendency of the swage or die to pull the point ofthe tooth in or break it off. It may also besaid that when any part ofthis machine is to be taken out for the purpose of repair, interchange,or otherwise, it can be done without dismouuting the other parts, ordisturbing the adjustments. For instance, the anvii-block and anvil canbe disengaged by hearing down and pulling out on the knob g, whichbrings said parts out to the position shown in Figs. 4 and 7. Either ofthe jaws or the die can also be taken out independently. The tail-piececan be movedv without reference to other mechanism; and so of others.This obviously is of advantage in practical operation, as much timewould otherwise be required for readjustments.

The operation of my said invention may be briefly recapitulated asfollows: The machine is first provided with a swage, anvil, and clampingjaws, adapted to the size of saw and the work desired to be done. It isthen in the position shown by the full lines in Fig. 1, placed upon thesaw. The lever C is then swung from the position shown in full lines tothe position shown in dotted lines, which clamps the machine firmly inplace upon the saw. The lever E is then swung from the position shown infull lines to the position shown in dotted lines, which operates boththe swage and anvil, and swages and dresses the saw tooth to which themachine has been applied, complete, at a single operation. The parts arethen reversed, and the machine advanced to the next tooth, when theoperation is repeated, and so on, until the saw is completely swaged.

Having thus fully described mysaid invention, what I claim as new, anddesire tosecure by Letters Patent, is

1. The combination, in a saw swaging and dressing machine, of thetail-piece A adj ustably secured to the frame, and the yoke A providedwith a bearing point suitable to rest upon the backs of the teeth of thesaw being operated upon below and out ofcontact with the sharp pointsthereof, said yoke being longitudinally adjustable uponsaid tail-piecewhereby said point may be adjusted to rest upon the backs of teeth ofdifferent sizes, substantially as and for the purposes set forth.

2. The combination, in a saw swaging and dressing machine, of atail-piece A secured to the frame, and a yoke A secured andlongitudinally adj ustable upon said tail-piece and provided with a pin(1. adapted to rest upon the backs of the teeth of-the saw beingoperated upon, just below the sharp points thereof, substantially asshown and described and for the purposes set forth.

3. The combination, in a saw swaging machine, of the frame A, thebracket A thereon, the swage or die, the lever E secured to said swageand mounted in said bracket, whereby the swage can be removed withoutdisturbing the lever, substantially as set forth.

4. The combination, in a saw swaging and dressing machine, of jaws B andB each bein g formed interchangeable and beveled upon all of its fourforward or operating corners, and said corners being formed in pairs,whereby a single pair of jaws is rendered equivalent to four separatepairs of jaws, with mechanism for forcing said jaws toward each other,swaging dies, and mechanism for operating said swaging dies,substantially as shown and described.

5. The combination, in a saw swaging and dressing machine, with theoperating mechanism, of two clamping jaws B and B, certain corners ofwhich are formed to fit against and dress the sides of saw teeth at thesame time they are being swaged, and certain corners of which are cutaway, so that by bringing said corners into use the teeth may be swagedonly, substantially as shown and described.

6. The combination in a saw swaging and dressing machine, of two jaws Band B, said jaw B being fixedly but adjustably secured to one side oftheframe work by means of a machine-screw b passing through a slot insaid frame-work into said jaw, and thejaw B being pivoted at the rearend on a stud b and a screw whereby the same may be driven toward orfrom said jaw B, substantially as shown and described.

7. In a machine for swaging and dressing saws, a pair of clamping jaws,one of which, B, is loosely mounted on a stud or pin L a bearing-block Bcarrying said stud or pin, and a second bearing-block B carrying thebearing-block B said bearing-block B being mounted upon the frame-work,said several IIC parts being adjustable one upon another, substantiallyas set forth.

8. The combination, in a saw swaging machine, of the swage, and theclamping jaws, one of said jaws being movable and supported upon a blockat its rear end,these parts being formed with a taper between them wherethey come togetherpwhereby the jaw is permitted to also drop away fromthe swage somewhat, as it swings'away from its fellow, substantially asset forth.

9. The combination, in a saw swaging machine, of the swage or die, andthe clamping jaws B and B, said clamping jaws being formed concaveattheir forward ends, and fitted over and partially supported by saidswage or die, substantially asset forth.

10. The combination, in asaw swaging machine, of a swage, an anvil, andtwo jaws the faces whereof are formed to fit the sides of j the finishedtooth, whereby all four sides of the point of the tooth-are swaged anddressed complete at one operation.

11. The combination, in a machine for swaging and dressing saw teeth, ofa pair of clamping-jaws, one fixedly but adjustably secured to onesideof the frame,and the other pivotally and adj ustably mounted on" theother side of the frame, a screw 0 by which said loosely mounted jaw isadapted to be driven toward the other'jaw, and a lever 0' whereby thesame is operated, said several parts being arranged and operatingsubstantially as set forth.

12. In a machine for swaging and dressing saw teeth, the combination,with a rotatory saw swage D having grooves or serrations in its surface,of a lever mounted thereon pro vided with a key-way, and a removable keyformed to fit in said key-way and into one or more of said grooves orserrations, whereby the relative position of the swage and the lever maybe adjusted, substantially as set forth."

13. The combination,in a saw swaging machine, of the anvil-block, thepitman, the cam operating said pitman, the arm F on said cam,'theleverE, the link E having hook e and the pin f and spring f 3 on saidarm F substantially as set forth.

14. The combination, with the swinginganvil block of a swaging machine,of a pitman for operating the same, said pitman being adj ustable, asdescribed, whereby the anvil may be adjusted for use on saws ofdifferent thicknesses, substantially as set forth.

15. The combination, in a saw swaging ma chine, of a swage or die,clamping jaws, a movable anvil, and moving mechanism therefor, saidanvil being secured to said moving mechanism by a laterally slidableattachment, whereby said anvil is adapted to reach its final positionbetween said jaws with uniform bearing upon both, substantially as setforth, w

16. The combination, in a machine for swagin g or dressing saws, of aswage having a camshaped operating face, and a cam or eccentric anvil,and a lever connected to both,

whereby they are simultaneously operated.

17. The combination, inasaw swaging machine, of a rotatory swageDhavinga cam-opcrating surface, a leverE secured to and opcrating said swage, apivoted or swinging anvil H, acamwhereby it is driven, an arm 'extendingout from said cam, and a link connecting said arm to said lever.

18.' The combination, in a saw swaging machine, ofa cam operating swage,a cam anvil, and mechanism for operating said swage and said anvil, saidmechanismbeing so connected as to move them in opposite directions onetoward the point of the tooth and the other from the point/of the toothtoward the root thereof in operation. 7

19. The combination, in as'aw swaging machine, of a swage, an anvil,mechanism for operating the same, and a spring whereby the anvil is heldagainst its pivot or oscillating point, substantially as shown anddescribed.

20. The combination, in a saw swaging machine, of the cam-shaped anvilH, the anvilblock working over apivotal point, as the point of the setscrew G a pitman connected to said anvil-block, and a cam operating saidpitman, substantially as set forth.

21. The combination, in a saw swaging machine, of an anvil, ananvil-block, and an adjustable screw G having a pivot point engagingwith said anvil-block, and over which said anvil-block pivots inoperation,substantially as set forth.

22. The combination, ina saw-swaging machine, of a cam-shaped anvil, ananvil-block carrying the same, a pivot over which said anvil-blockoperates, a pitman for operating said anvil-block having a cross-head,and a bifurcated part'G' engaging with said crosshead, substantially asset forth.

23. The combination, in a saw swaging machine, of a cam-shaped anvil, ananvil-block, apitman for operating the same, said pitman being formed oftwo parts, and adjustable one upon the other, whereby the motion isaccurately adjusted and determined, substantially as set forth.

In witness whereof Ihavehereunto set my hand and seal, at Indianapolis,Indiana, this 27th day of April, A. D. 1893.

JOHN F. PRIBNOW.- .[n 8.]

